[onert] Introduce ExtraTensorIndex

[zetwhite]

This PR introduces ExtraTensorIndex.
ExtraTensorIndex will be used to identify extra tensor in tensor registry.

ONE-DCO-1.0-Signed-off-by: seunghui youn [email protected]

draft : #13486
related : #13282

[glistening]

When I read ExtraTensorIndex, it was hard at least for me what ExtraTensor does mean.
To figure out the meaning of ExtranTensor, I searched and found the answer in #13576.

ExtraTensor is a tensor that is accessed within one operation layer.
In other words, the scope of the extra tensor is confined to one specific layer.

It would be better to use some terms in your explanation above.
(e.g. LayerScopeTensor, LayerTemporaryTensor, ...)

(ADD)

@zetwhite told me that I am not the only one who was curious of the meaning of Extra — #13604 (comment)

[zetwhite]

It would be better to use some terms in your explanation above. (e.g. LayerScopeTensor, LayerTemporaryTensor, ...)

Thansk for comments! I also feel awkward with the name 'Extra'.
@ys44kim asked me similar a questions(#13604 (comment)) and I feel hard to explain where the name comes from.

The name LayerTemporaryTensor looks good to me. I will rename it soon.

(+) About renaming it, I will do it at once, after both this PR and #13604 are merged.

[jyoungyun]

LGTM

[glistening]

@zetwhite or who is going to merge this,

Please update a typo in commit message.

ExtraTensorIndex will be used to indentify identify extra tensor in tensor registry.

[zetwhite]

Please update a typo in commit message.

Ah, Nice catch. I updated.
Thank you

[glistening]

(optional) Personally, I prefer to remove this assert.

In general, sizeof(size_t) is 4 on 32-bit system, 8 on 64-bit system. Both cases, it is >= 4 (= sizeof(uint32_t)).

If any, I don't think onert will support such kind of system.

[ragmani]

LGTM

[jyoungyun]

LGTM